My buddy blew his tranny today at the track. He's got a 95 12V, with all hte goodies and then some. He had the trans. moded by BD performance. When he puts the truck in park it doesnt lock in place, he cant put it in any gear when the vehicle is running b/c it grinds, what could be broken, possibly an input shaft, maybe flex plate, any ideas???

 

probably the output shaft.